Are you looking to back up or your entire operating system ?
A backup is only useful if it actually works. Periodically test your backup by attempting to restore a file or folder to ensure the backup is functioning correctly. This simple verification step can save you from discovering a corrupted backup only when disaster strikes.
Alternatively, use the Windows 11 Media Creation Tool to convert a spare USB flash drive into a bootable recovery drive. Essential Pre-Backup Checklist
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In late 2023 and 2024 updates (versions 22H2 and 23H2), Windows 11 changed the default backup narrative:
Set to Until space is needed to maximize drive efficiency.
Toggle to On .